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Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/SwtUtils.java')
| -rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/SwtUtils.java | 457 |
1 files changed, 457 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/SwtUtils.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/SwtUtils.java new file mode 100644 index 000000000..64e91bedf --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/SwtUtils.java @@ -0,0 +1,457 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Eclipse Public License, Version 1.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.eclipse.org/org/documents/epl-v10.php + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package com.android.ide.eclipse.adt.internal.editors.layout.gle2; + +import static com.android.ide.eclipse.adt.internal.editors.layout.gle2.ImageUtils.SHADOW_SIZE; + +import com.android.ide.common.api.Rect; +import com.android.ide.eclipse.adt.internal.editors.IconFactory; + +import org.eclipse.swt.SWTException; +import org.eclipse.swt.graphics.Device; +import org.eclipse.swt.graphics.Font; +import org.eclipse.swt.graphics.FontMetrics; +import org.eclipse.swt.graphics.GC; +import org.eclipse.swt.graphics.Image; +import org.eclipse.swt.graphics.ImageData; +import org.eclipse.swt.graphics.PaletteData; +import org.eclipse.swt.graphics.Rectangle; +import org.eclipse.swt.widgets.Control; +import org.eclipse.swt.widgets.Display; + +import java.awt.Graphics; +import java.awt.image.BufferedImage; +import java.awt.image.DataBuffer; +import java.awt.image.DataBufferByte; +import java.awt.image.DataBufferInt; +import java.awt.image.WritableRaster; +import java.util.List; + +/** + * Various generic SWT utilities such as image conversion. + */ +public class SwtUtils { + + private SwtUtils() { + } + + /** + * Returns the {@link PaletteData} describing the ARGB ordering expected from integers + * representing pixels for AWT {@link BufferedImage}. + * + * @param imageType the {@link BufferedImage#getType()} type + * @return A new {@link PaletteData} suitable for AWT images. + */ + public static PaletteData getAwtPaletteData(int imageType) { + switch (imageType) { + case BufferedImage.TYPE_INT_RGB: + case BufferedImage.TYPE_INT_ARGB: + case BufferedImage.TYPE_INT_ARGB_PRE: + return new PaletteData(0x00FF0000, 0x0000FF00, 0x000000FF); + + case BufferedImage.TYPE_3BYTE_BGR: + case BufferedImage.TYPE_4BYTE_ABGR: + case BufferedImage.TYPE_4BYTE_ABGR_PRE: + return new PaletteData(0x000000FF, 0x0000FF00, 0x00FF0000); + + default: + throw new UnsupportedOperationException("RGB type not supported yet."); + } + } + + /** + * Returns true if the given type of {@link BufferedImage} is supported for + * conversion. For unsupported formats, use + * {@link #convertToCompatibleFormat(BufferedImage)} first. + * + * @param imageType the {@link BufferedImage#getType()} + * @return true if we can convert the given buffered image format + */ + private static boolean isSupportedPaletteType(int imageType) { + switch (imageType) { + case BufferedImage.TYPE_INT_RGB: + case BufferedImage.TYPE_INT_ARGB: + case BufferedImage.TYPE_INT_ARGB_PRE: + case BufferedImage.TYPE_3BYTE_BGR: + case BufferedImage.TYPE_4BYTE_ABGR: + case BufferedImage.TYPE_4BYTE_ABGR_PRE: + return true; + default: + return false; + } + } + + /** Converts the given arbitrary {@link BufferedImage} to another {@link BufferedImage} + * in a format that is supported (see {@link #isSupportedPaletteType(int)}) + * + * @param image the image to be converted + * @return a new image that is in a guaranteed compatible format + */ + private static BufferedImage convertToCompatibleFormat(BufferedImage image) { + BufferedImage converted = new BufferedImage(image.getWidth(), image.getHeight(), + BufferedImage.TYPE_INT_ARGB); + Graphics graphics = converted.getGraphics(); + graphics.drawImage(image, 0, 0, null); + graphics.dispose(); + + return converted; + } + + /** + * Converts an AWT {@link BufferedImage} into an equivalent SWT {@link Image}. Whether + * the transparency data is transferred is optional, and this method can also apply an + * alpha adjustment during the conversion. + * <p/> + * Implementation details: on Windows, the returned {@link Image} will have an ordering + * matching the Windows DIB (e.g. RGBA, not ARGB). Callers must make sure to use + * <code>Image.getImageData().paletteData</code> to get the right pixels out of the image. + * + * @param display The display where the SWT image will be shown + * @param awtImage The AWT {@link BufferedImage} + * @param transferAlpha If true, copy alpha data out of the source image + * @param globalAlpha If -1, do nothing, otherwise adjust the alpha of the final image + * by the given amount in the range [0,255] + * @return A new SWT {@link Image} with the same contents as the source + * {@link BufferedImage} + */ + public static Image convertToSwt(Device display, BufferedImage awtImage, + boolean transferAlpha, int globalAlpha) { + if (!isSupportedPaletteType(awtImage.getType())) { + awtImage = convertToCompatibleFormat(awtImage); + } + + int width = awtImage.getWidth(); + int height = awtImage.getHeight(); + + WritableRaster raster = awtImage.getRaster(); + DataBuffer dataBuffer = raster.getDataBuffer(); + ImageData imageData = + new ImageData(width, height, 32, getAwtPaletteData(awtImage.getType())); + + if (dataBuffer instanceof DataBufferInt) { + int[] imageDataBuffer = ((DataBufferInt) dataBuffer).getData(); + imageData.setPixels(0, 0, imageDataBuffer.length, imageDataBuffer, 0); + } else if (dataBuffer instanceof DataBufferByte) { + byte[] imageDataBuffer = ((DataBufferByte) dataBuffer).getData(); + try { + imageData.setPixels(0, 0, imageDataBuffer.length, imageDataBuffer, 0); + } catch (SWTException se) { + // Unsupported depth + return convertToSwt(display, convertToCompatibleFormat(awtImage), + transferAlpha, globalAlpha); + } + } + + if (transferAlpha) { + byte[] alphaData = new byte[height * width]; + for (int y = 0; y < height; y++) { + byte[] alphaRow = new byte[width]; + for (int x = 0; x < width; x++) { + int alpha = awtImage.getRGB(x, y) >>> 24; + + // We have to multiply in the alpha now since if we + // set ImageData.alpha, it will ignore the alphaData. + if (globalAlpha != -1) { + alpha = alpha * globalAlpha >> 8; + } + + alphaRow[x] = (byte) alpha; + } + System.arraycopy(alphaRow, 0, alphaData, y * width, width); + } + + imageData.alphaData = alphaData; + } else if (globalAlpha != -1) { + imageData.alpha = globalAlpha; + } + + return new Image(display, imageData); + } + + /** + * Converts a direct-color model SWT image to an equivalent AWT image. If the image + * does not have a supported color model, returns null. This method does <b>NOT</b> + * preserve alpha in the source image. + * + * @param swtImage the SWT image to be converted to AWT + * @return an AWT image representing the source SWT image + */ + public static BufferedImage convertToAwt(Image swtImage) { + ImageData swtData = swtImage.getImageData(); + BufferedImage awtImage = + new BufferedImage(swtData.width, swtData.height, BufferedImage.TYPE_INT_ARGB); + PaletteData swtPalette = swtData.palette; + if (swtPalette.isDirect) { + PaletteData awtPalette = getAwtPaletteData(awtImage.getType()); + + if (swtPalette.equals(awtPalette)) { + // No color conversion needed. + for (int y = 0; y < swtData.height; y++) { + for (int x = 0; x < swtData.width; x++) { + int pixel = swtData.getPixel(x, y); + awtImage.setRGB(x, y, 0xFF000000 | pixel); + } + } + } else { + // We need to remap the colors + int sr = -awtPalette.redShift + swtPalette.redShift; + int sg = -awtPalette.greenShift + swtPalette.greenShift; + int sb = -awtPalette.blueShift + swtPalette.blueShift; + + for (int y = 0; y < swtData.height; y++) { + for (int x = 0; x < swtData.width; x++) { + int pixel = swtData.getPixel(x, y); + + int r = pixel & swtPalette.redMask; + int g = pixel & swtPalette.greenMask; + int b = pixel & swtPalette.blueMask; + r = (sr < 0) ? r >>> -sr : r << sr; + g = (sg < 0) ? g >>> -sg : g << sg; + b = (sb < 0) ? b >>> -sb : b << sb; + + pixel = 0xFF000000 | r | g | b; + awtImage.setRGB(x, y, pixel); + } + } + } + } else { + return null; + } + + return awtImage; + } + + /** + * Creates a new image from a source image where the contents from a given set of + * bounding boxes are copied into the new image and the rest is left transparent. A + * scale can be applied to make the resulting image larger or smaller than the source + * image. Note that the alpha channel in the original image is ignored, and the alpha + * values for the painted rectangles will be set to a specific value passed into this + * function. + * + * @param image the source image + * @param rectangles the set of rectangles (bounding boxes) to copy from the source + * image + * @param boundingBox the bounding rectangle of the rectangle list, which can be + * computed by {@link ImageUtils#getBoundingRectangle} + * @param scale a scale factor to apply to the result, e.g. 0.5 to shrink the + * destination down 50%, 1.0 to leave it alone and 2.0 to zoom in by + * doubling the image size + * @param alpha the alpha (in the range 0-255) that painted bits should be set to + * @return a pair of the rendered cropped image, and the location within the source + * image that the crop begins (multiplied by the scale). May return null if + * there are no selected items. + */ + public static Image drawRectangles(Image image, + List<Rectangle> rectangles, Rectangle boundingBox, double scale, byte alpha) { + + if (rectangles.size() == 0 || boundingBox == null || boundingBox.isEmpty()) { + return null; + } + + ImageData srcData = image.getImageData(); + int destWidth = (int) (scale * boundingBox.width); + int destHeight = (int) (scale * boundingBox.height); + + ImageData destData = new ImageData(destWidth, destHeight, srcData.depth, srcData.palette); + byte[] alphaData = new byte[destHeight * destWidth]; + destData.alphaData = alphaData; + + for (Rectangle bounds : rectangles) { + int dx1 = bounds.x - boundingBox.x; + int dy1 = bounds.y - boundingBox.y; + int dx2 = dx1 + bounds.width; + int dy2 = dy1 + bounds.height; + + dx1 *= scale; + dy1 *= scale; + dx2 *= scale; + dy2 *= scale; + + int sx1 = bounds.x; + int sy1 = bounds.y; + int sx2 = sx1 + bounds.width; + int sy2 = sy1 + bounds.height; + + if (scale == 1.0d) { + for (int dy = dy1, sy = sy1; dy < dy2; dy++, sy++) { + for (int dx = dx1, sx = sx1; dx < dx2; dx++, sx++) { + destData.setPixel(dx, dy, srcData.getPixel(sx, sy)); + alphaData[dy * destWidth + dx] = alpha; + } + } + } else { + // Scaled copy. + int sxDelta = sx2 - sx1; + int dxDelta = dx2 - dx1; + int syDelta = sy2 - sy1; + int dyDelta = dy2 - dy1; + for (int dy = dy1, sy = sy1; dy < dy2; dy++, sy = (dy - dy1) * syDelta / dyDelta + + sy1) { + for (int dx = dx1, sx = sx1; dx < dx2; dx++, sx = (dx - dx1) * sxDelta + / dxDelta + sx1) { + assert sx < sx2 && sy < sy2; + destData.setPixel(dx, dy, srcData.getPixel(sx, sy)); + alphaData[dy * destWidth + dx] = alpha; + } + } + } + } + + return new Image(image.getDevice(), destData); + } + + /** + * Creates a new empty/blank image of the given size + * + * @param display the display to associate the image with + * @param width the width of the image + * @param height the height of the image + * @return a new blank image of the given size + */ + public static Image createEmptyImage(Display display, int width, int height) { + BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); + return SwtUtils.convertToSwt(display, image, false, 0); + } + + /** + * Converts the given SWT {@link Rectangle} into an ADT {@link Rect} + * + * @param swtRect the SWT {@link Rectangle} + * @return an equivalent {@link Rect} + */ + public static Rect toRect(Rectangle swtRect) { + return new Rect(swtRect.x, swtRect.y, swtRect.width, swtRect.height); + } + + /** + * Sets the values of the given ADT {@link Rect} to the values of the given SWT + * {@link Rectangle} + * + * @param target the ADT {@link Rect} to modify + * @param source the SWT {@link Rectangle} to read values from + */ + public static void set(Rect target, Rectangle source) { + target.set(source.x, source.y, source.width, source.height); + } + + /** + * Compares an ADT {@link Rect} with an SWT {@link Rectangle} and returns true if they + * are equivalent + * + * @param r1 the ADT {@link Rect} + * @param r2 the SWT {@link Rectangle} + * @return true if the two rectangles are equivalent + */ + public static boolean equals(Rect r1, Rectangle r2) { + return r1.x == r2.x && r1.y == r2.y && r1.w == r2.width && r1.h == r2.height; + + } + + /** + * Get the average width of the font used by the given control + * + * @param display the display associated with the font usage + * @param font the font to look up the average character width for + * @return the average width, in pixels, of the given font + */ + public static final int getAverageCharWidth(Display display, Font font) { + GC gc = new GC(display); + gc.setFont(font); + FontMetrics fontMetrics = gc.getFontMetrics(); + int width = fontMetrics.getAverageCharWidth(); + gc.dispose(); + return width; + } + + /** + * Get the average width of the given font + * + * @param control the control to look up the default font for + * @return the average width, in pixels, of the current font in the control + */ + public static final int getAverageCharWidth(Control control) { + GC gc = new GC(control.getDisplay()); + int width = gc.getFontMetrics().getAverageCharWidth(); + gc.dispose(); + return width; + } + + /** + * Draws a drop shadow for the given rectangle into the given context. It + * will not draw anything if the rectangle is smaller than a minimum + * determined by the assets used to draw the shadow graphics. + * <p> + * This corresponds to {@link ImageUtils#drawRectangleShadow(Graphics, int, int, int, int)}, + * but applied directly to an SWT graphics context instead, such that no image conversion + * has to be performed. + * <p> + * Make sure to keep changes in the visual appearance here in sync with the + * AWT version in {@link ImageUtils#drawRectangleShadow(Graphics, int, int, int, int)}. + * + * @param gc the graphics context to draw into + * @param x the left coordinate of the left hand side of the rectangle + * @param y the top coordinate of the top of the rectangle + * @param width the width of the rectangle + * @param height the height of the rectangle + */ + public static final void drawRectangleShadow(GC gc, int x, int y, int width, int height) { + if (sShadowBottomLeft == null) { + IconFactory icons = IconFactory.getInstance(); + // See ImageUtils.drawRectangleShadow for an explanation of the assets. + sShadowBottomLeft = icons.getIcon("shadow-bl"); //$NON-NLS-1$ + sShadowBottom = icons.getIcon("shadow-b"); //$NON-NLS-1$ + sShadowBottomRight = icons.getIcon("shadow-br"); //$NON-NLS-1$ + sShadowRight = icons.getIcon("shadow-r"); //$NON-NLS-1$ + sShadowTopRight = icons.getIcon("shadow-tr"); //$NON-NLS-1$ + assert sShadowBottomRight.getImageData().width == SHADOW_SIZE; + assert sShadowBottomRight.getImageData().height == SHADOW_SIZE; + } + + ImageData bottomLeftData = sShadowBottomLeft.getImageData(); + ImageData topRightData = sShadowTopRight.getImageData(); + ImageData bottomData = sShadowBottom.getImageData(); + ImageData rightData = sShadowRight.getImageData(); + int blWidth = bottomLeftData.width; + int trHeight = topRightData.height; + if (width < blWidth) { + return; + } + if (height < trHeight) { + return; + } + + gc.drawImage(sShadowBottomLeft, x, y + height); + gc.drawImage(sShadowBottomRight, x + width, y + height); + gc.drawImage(sShadowTopRight, x + width, y); + gc.drawImage(sShadowBottom, + 0, 0, + bottomData.width, bottomData.height, + x + bottomLeftData.width, y + height, + width - bottomLeftData.width, bottomData.height); + gc.drawImage(sShadowRight, + 0, 0, + rightData.width, rightData.height, + x + width, y + topRightData.height, + rightData.width, height - topRightData.height); + } + + private static Image sShadowBottomLeft; + private static Image sShadowBottom; + private static Image sShadowBottomRight; + private static Image sShadowRight; + private static Image sShadowTopRight; +} |